Google Ads Conversions From Registrations

[esdaves]

Running ads for a company to promote a webinar each month. The problem I am facing is that when a potential client clicks the registration page link, all the Google click id info is lost. Is there an integration or process I can use to preserve the date (URL parameters) from the Source Page and carry that over to the Registration Page?

I already know a process using Zapier to link the Zoom participant creation to create a conversion in Google Ads. The problem is that without the click ID, Google can only see that a conversion was tracked, but it has no idea what caused the conversion.

Client Path diagramed below:

Ad Clicked --> Our LP -(All click data lost here)-> Zoom Meeting Registration LP --> Creates Google Conversion.

Essentially the problem now is that Google brings in leads, but doesn't understand, due to lack of detailed feedback, which clicks the leads are coming from.

Any help in resolving this would be greatly appreciated.

[giemedia]

Hi @esdaves did you ever find a resolution for this? 

[meriment]

You will need to leverage APIs to accomplish this. You will want to trigger a webhook with the click date passed as a parameter so as to match the click to the ultimate registration record. If you are not a developer there is a Zoom app, Salepager, that lets you create a link to the Zoom registration page that preserves the date. This can then be stored to match to a registrant, letting you identify what caused the conversion.

[bethgranter]

Hi @meriment would you mind providing more details please? I looked at the Salepager app but it didn't mention anything to do with this functionality. And I don't quite follow how it would connect to Google Analytics / Google Ads for conversion tracking?

Also do you mean click date or click data? As there may be multiple clicks with the same date... so I am not clear how the matching would happen.

I also like the OP considered Zapier for this, but am unclear how to connect the website link click to Zoom with the Zoom registration event as the same user.

Thank you. 

[Sweely]

That's a frustrating but common issue, often related to cross-domain tracking or the way the registration form is implemented.

The core problem is that your Google Click ID (GCLID) and other URL parameters (like those for auto-tagging) are being lost when the user navigates from your Landing Page (LP) to the Zoom Meeting Registration LP.

This usually happens because your LP isn't correctly passing the parameters to the Zoom domain, which may be hosted elsewhere or using an embedded form that resets the page context.

A better, more robust, and privacy-compliant solution than trying to hack the front-end parameter passing is a server-side tracking setup.

While you mention using Zapier to send a conversion back, it's missing the critical GCLID.

This ID is essential for Google Ads to attribute the conversion back to a specific click and campaign.

The ideal server-side solution involves using the Zoom API to capture participant data, connecting that to a backend, and then using the Google Ads API for Enhanced Conversions.

Here's why Zoom API + Google Ads API + Google Analytics Data API + Google Tag Manager (GTM) + a service like Stape or Google Cloud Platform (GCP) is a superior approach: Instead of relying on a fragile chain of URL parameters in the browser, you shift the conversion tracking to the server.

When the user lands on your LP, you use GTM to capture the GCLID from the URL and store it locally (in a cookie or local storage) on your domain before they click through to Zoom.

When they register on Zoom, the Zoom API triggers a webhook to your server (or Stape/GCP).

This server-side process takes the user's identifiable information (like email or phone number) provided during registration, hashes it (a requirement for Enhanced Conversions), retrieves the GCLID you stored earlier using that user's information, and sends both the hashed data and the GCLID directly to the Google Ads API.

This is far more reliable because it bypasses the browser's limitations on cross-domain parameter passing and is less prone to ad blocker interference.

Furthermore, integrating with the Google Analytics Data API allows you to send richer conversion data to GA4, linking the registration event to the original Google Ads session data.

This gives you a complete, deterministic view of the user journey, which is what your current setup is missing.

Services like Stape or using GCP with a custom server-side GTM container simplify this immensely, acting as the middleware that receives the Zoom webhook, matches the user to the stored GCLID, and sends the payload to Google Ads and Analytics APIs.

This method also opens the door to using the purchase or generate_lead standard events server-side, providing a cleaner data layer for all your advertising platforms.

It resolves the fundamental issue of data loss by making the GCLID persistence and conversion reporting an explicit server-to-server transaction, not a series of dependent, fragile front-end URL redirects.

[bethgranter]

@esdaves I'm also wondering if you managed to resolve this?